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#!/bin/bash
# Disable firewall
chkconfig iptables off
chkconfig ip6tables off
chkconfig sshd on
# Networking setup...
# Don't fix ethX names to hw address.
#rm -f /etc/udev/rules.d/*persistent-net.rules
#rm -f /etc/udev/rules.d/*-net.rules
rm -rf /var/lib/dhclient/* # remove any old leases that could be around...
# XXX: unsure if this will help, but we'll try it out:
# Problem situation: Two interfaces are connected to same network. One interface
# wants to renew DHCP lease and asks server for address. DHCPACK message from
# server arrives, client moves to BOUND state. The client performs a check on
# the suggested address to ensure that the address is not already in use. On
# arping for specified IP address, other interface replies and that's why
# dhclient-script replies with DHCPDECLINE message. (See RFC2131, 4.4.1.).
# Solution: Set sysctl to reply only if the target IP address is local address
# configured on the incoming interface. (See kernel documentation
# Documentation/networking/ip-sysctl.txt)
set_sysctl() {
grep "$1" /etc/sysctl.conf > /dev/null
[ $? -eq 0 ] && sed -i '/'$1'/d' /etc/sysctl.conf
echo "$1 = $2" >> /etc/sysctl.conf
}
set_sysctl 'net.ipv4.conf.all.arp_ignore' 1
set_sysctl 'net.ipv4.conf.all.arp_announce' 2
set_sysctl 'net.ipv4.conf.all.rp_filter' 3
# Interface eth0 should get IP address via dhcp.
#cat > /etc/sysconfig/network-scripts/ifcfg-eth0 << EOF
#DEVICE="eth0"
#BOOTPROTO="dhcp"
#ONBOOT="yes"
#NM_CONTROLLED="no"
#EOF
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